Can any one tell me how/why?

[GavG]

I have searched through the threads and can't find an answer or simple solution for my issue and would be gratefull of any help.

When modeling in Max I have been using instances instead of copys of some parts to try and save time texturing later, but the instances aren't showing up in NL. I am sure I have used this method before and never had a problem with it but for some reason I am lost on this. The easiest solution is just to copy and take more time later on but I would like to avoid this if possible.

Thanks for any advice in advance.